Massage ball



FIG. 1 is a top, front, and right perspective view of a massage ballshowing my new design;

FIG. 2 is a front elevational view thereof, the rear, the left side, andthe right side being mirror images;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a cross-sectional view taken along the line 5-5 in FIG. 2 ;and,

FIG. 6 is a perspective view showing the massage ball in use.

The broken lines in the drawings illustrate portions of the massage ballwhich form no part of the claimed design.

CLAIM I claim the ornamental design for a massage ball, as shown anddescribed.